Econ Fig. 517, Fig. 512, Fig. 518 Installation & Operation Manual
Installation & Operation Manual
Proven Quality since 1892
ECON safety valves Fig. 512, 517 and 518 www.eriks.com
Rev. 1
Content
1. ERIKS operating companies
2. Product description
3. Requirements for maintenance staff
4. Transport and storage
5. Function
6. Application
7. Installation
8. Maintenance
9. Service and repair
10. Possible danger
11. Troubleshooting
12. Removal
Fig. 512 Fig. 517 Fig. 518
1. ERIKS operating companies
ECON safety valves are being delivered by several ERIKS operating companies on a worldwide
basis. In this manual these will be referred to as ‘ERIKS’, the individual terms of delivery of the
ERIKS operating company having executed the order are applicable.
2. Product description
The ECON safety valves fig 512 / 517 / 518 are type-tested acc ISO 4126-1. They are approved
PED category IV (module B+D).
Information about the safety valves can be found in the according datasheet and capacity table.
The safety valves may only be used in accordance with the applicable pressure-temperaturerating
as stated in its datasheet.
The marking makes the identification of the valve easier and contains:
- ECON logo + figure number
- size
- CE marking and identification number of the inspection authority
- flow area
- sealing material
- serial number
- heat number
- set pressure
Installation & Operation Manual
Proven Quality since 1892
ECON safety valves Fig. 512, 517 and 518 www.eriks.com
Rev. 1
3. Requirements for maintenance staff
The staff assigned to assembly, operating and maintenance tasks should be qualified to carry out
such jobs and in any circumstance, ensure personal safety.
4. Transport and storage
The safety valves have very precise fabricated sealing surfaces in order to avoid leakage. During
transport and installation, they have to be handled very careful to avoid any damage on these
sealing surfaces
Transport and storage should always be carried out with the disc complete closed and the safety
valve should be protected against external forces, influence and destruction. The safety valve
should be stored in an unpolluted space and should also be protected against all atmospheric
circumstances. There should be taken care of the temperature and humidity in the room, in order
to prevent condensate formation.
5. Function
ECON safety valves have the function to protect the system against excessive pressure. When
normal pressure conditions are achieved, the valve will re-close automatically.
At a safety valve, the following pressures can occur:
- working pressure: the pressure in the system at normal working condition
- set pressure: the adjusted pressure at which the safety valve under normal use
circumstances commences to open. The forces on the disc are in balance.
- cold differential test pressure (CDTP): the adjusted static inlet pressure, at which the safety
valve on the test bench starts to open.
- back pressure: the sum of built-up pressure (pressure at the outlet of a safety valve caused
by flow through the valve and the discharge system) and superimposed back pressure
(existing pressure in the discharge system at the moment the safety valve is still closed)
Back pressure will influence the behavior and capacity of the safety valve and must be taken
into account when selecting a safety valve.
6. Application
ECON safety valves with threaded connection are mainly applied in the process industry and are
suitable for gasses and liquids. This type of safety valve is also suitable as an overflow. For the
use of extreme conditions e.g. aggressive or abrasive media, it is recommended to mention this at
the ordering stage, to verify whether the valve is suitable.
The installation designer is responsible for the safety valve selection, suitable for the working
conditions. The valves are unsuitable, without written permission of an ERIKS company, to apply
for hazardous media as referred into Regulation (EC) No 1272/2008.
Fig.512: Safety valve with gas-tight cap
DN
do L h H SW
Weight
G ["]
[mm]
[kg]
½
13
30
30
71
28
0,4
¾
19
33
35
79
34
0,6
1
25
40
41
95
41 1 1 ¼
30
45
45
110
52
1,75
1 ½
38
50
51
135
58
2,3
2
50
60
60
140
70
3,3
Loading...